John 6:71 KJV
He spake of Judas Iscariot the son of Simon: for he it was that should betray him, being one of the twelve.
John 6:71, King James Version
In context
70 Jesus answered them, Have not I chosen you twelve, and one of you is a devil?
71 He spake of Judas Iscariot the son of Simon: for he it was that should betray him, being one of the twelve.